In May 2018, the Consumer Prices Index (CPI) accelerated to +0.4% over one month, after a slowdown in April (+0.2%). This higher rise came from those in energy prices (+2.0% after +0.9%), food prices (+0.9% after +0.1%) and "manufactured product" prices (+0.3% after +0.1%). Services prices increased at the same pace as in the previous month (+0.1%) and those of tobacco dropped by 0.6% after a stability in April.

Seasonally adjusted, consumer prices accelerated: +0.3% after +0.1% in April.

Year on year, consumer prices rose by 2.0%, 0.4 points of percentage more than in the previous month. This stronger increase resulted from a sharp year-on-year acceleration in energy prices and, to a lesser extent, in these of food and services. "Manufactured product" prices fell a little less than in the previous month and tobacco prices slowed down.